Home / 991,588,868.28-1,487,564,904.78-409,005,307.80

Finding the Fourth Proportional to 991,588,868.28, 1,487,564,904.78 and 409,005,307.80

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Solution

The fourth proportional to 991,588,868.28, 1,487,564,904.78 and 409,005,307.80 is: 613,582,868.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,588,868.28 : 1,487,564,904.78 = 409,005,307.80 : x
  2. Step 2: Convert to fraction form
    991,588,868.28/1,487,564,904.78 = 409,005,307.80/x
  3. Step 3: Cross multiply
    991,588,868.28x = 1,487,564,904.78 × 409,005,307.80
  4. Step 4: Simplify right side
    991,588,868.28x = 608,421,941,752,021,632
  5. Step 5: Solve for x
    x = 608,421,941,752,021,632/991,588,868.28
  6. Step 6: Final answer
    x = 613,582,868.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.