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Finding the Fourth Proportional to 1,572,645, 2,358,969.12 and 390,693

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Solution

The fourth proportional to 1,572,645, 2,358,969.12 and 390,693 is: 586,039.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572,645 : 2,358,969.12 = 390,693 : x
  2. Step 2: Convert to fraction form
    1,572,645/2,358,969.12 = 390,693/x
  3. Step 3: Cross multiply
    1,572,645x = 2,358,969.12 × 390,693
  4. Step 4: Simplify right side
    1,572,645x = 921,632,722,400.16
  5. Step 5: Solve for x
    x = 921,632,722,400.16/1,572,645
  6. Step 6: Final answer
    x = 586,039.90

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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.