Home / 991,721.40-1,487,582.10-921,737.40

Finding the Fourth Proportional to 991,721.40, 1,487,582.10 and 921,737.40

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Solution

The fourth proportional to 991,721.40, 1,487,582.10 and 921,737.40 is: 1,382,606.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,721.40 : 1,487,582.10 = 921,737.40 : x
  2. Step 2: Convert to fraction form
    991,721.40/1,487,582.10 = 921,737.40/x
  3. Step 3: Cross multiply
    991,721.40x = 1,487,582.10 × 921,737.40
  4. Step 4: Simplify right side
    991,721.40x = 1,371,160,057,140.54
  5. Step 5: Solve for x
    x = 1,371,160,057,140.54/991,721.40
  6. Step 6: Final answer
    x = 1,382,606.10

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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.