Home / 790,806,513.21-1,091,312,970.89-438,381,610.89

Finding the Fourth Proportional to 790,806,513.21, 1,091,312,970.89 and 438,381,610.89

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Solution

The fourth proportional to 790,806,513.21, 1,091,312,970.89 and 438,381,610.89 is: 604,966,613.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,806,513.21 : 1,091,312,970.89 = 438,381,610.89 : x
  2. Step 2: Convert to fraction form
    790,806,513.21/1,091,312,970.89 = 438,381,610.89/x
  3. Step 3: Cross multiply
    790,806,513.21x = 1,091,312,970.89 × 438,381,610.89
  4. Step 4: Simplify right side
    790,806,513.21x = 478,411,538,161,717,952
  5. Step 5: Solve for x
    x = 478,411,538,161,717,952/790,806,513.21
  6. Step 6: Final answer
    x = 604,966,613.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.