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Finding the Fourth Proportional to 603,806.60, 904,673.10 and 319,075.40

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Solution

The fourth proportional to 603,806.60, 904,673.10 and 319,075.40 is: 478,065.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,806.60 : 904,673.10 = 319,075.40 : x
  2. Step 2: Convert to fraction form
    603,806.60/904,673.10 = 319,075.40/x
  3. Step 3: Cross multiply
    603,806.60x = 904,673.10 × 319,075.40
  4. Step 4: Simplify right side
    603,806.60x = 288,658,931,251.74
  5. Step 5: Solve for x
    x = 288,658,931,251.74/603,806.60
  6. Step 6: Final answer
    x = 478,065.21

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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.