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Finding the Fourth Proportional to 690,407.04, 1,035,264.22 and 402,312

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Solution

The fourth proportional to 690,407.04, 1,035,264.22 and 402,312 is: 603,266.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,407.04 : 1,035,264.22 = 402,312 : x
  2. Step 2: Convert to fraction form
    690,407.04/1,035,264.22 = 402,312/x
  3. Step 3: Cross multiply
    690,407.04x = 1,035,264.22 × 402,312
  4. Step 4: Simplify right side
    690,407.04x = 416,499,218,876.64
  5. Step 5: Solve for x
    x = 416,499,218,876.64/690,407.04
  6. Step 6: Final answer
    x = 603,266.18

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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.