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Finding the Fourth Proportional to 1,572,792, 2,359,188.16 and 390,840

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Solution

The fourth proportional to 1,572,792, 2,359,188.16 and 390,840 is: 586,260.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572,792 : 2,359,188.16 = 390,840 : x
  2. Step 2: Convert to fraction form
    1,572,792/2,359,188.16 = 390,840/x
  3. Step 3: Cross multiply
    1,572,792x = 2,359,188.16 × 390,840
  4. Step 4: Simplify right side
    1,572,792x = 922,065,100,454.40
  5. Step 5: Solve for x
    x = 922,065,100,454.40/1,572,792
  6. Step 6: Final answer
    x = 586,260.04

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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.