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Finding the Fourth Proportional to 421,666,374.60, 632,499,561.90 and 249,054,337.80

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Solution

The fourth proportional to 421,666,374.60, 632,499,561.90 and 249,054,337.80 is: 373,581,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,666,374.60 : 632,499,561.90 = 249,054,337.80 : x
  2. Step 2: Convert to fraction form
    421,666,374.60/632,499,561.90 = 249,054,337.80/x
  3. Step 3: Cross multiply
    421,666,374.60x = 632,499,561.90 × 249,054,337.80
  4. Step 4: Simplify right side
    421,666,374.60x = 157,526,759,547,794,624
  5. Step 5: Solve for x
    x = 157,526,759,547,794,624/421,666,374.60
  6. Step 6: Final answer
    x = 373,581,506.70

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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.