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Finding the Fourth Proportional to 453,802.40, 680,703.60 and 390,816.80

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Solution

The fourth proportional to 453,802.40, 680,703.60 and 390,816.80 is: 586,225.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,802.40 : 680,703.60 = 390,816.80 : x
  2. Step 2: Convert to fraction form
    453,802.40/680,703.60 = 390,816.80/x
  3. Step 3: Cross multiply
    453,802.40x = 680,703.60 × 390,816.80
  4. Step 4: Simplify right side
    453,802.40x = 266,030,402,700.48
  5. Step 5: Solve for x
    x = 266,030,402,700.48/453,802.40
  6. Step 6: Final answer
    x = 586,225.20

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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.