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Finding the Fourth Proportional to 393,312,000.80, 549,616,434.40 and 393,312,000.80

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Solution

The fourth proportional to 393,312,000.80, 549,616,434.40 and 393,312,000.80 is: 549,616,434.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,312,000.80 : 549,616,434.40 = 393,312,000.80 : x
  2. Step 2: Convert to fraction form
    393,312,000.80/549,616,434.40 = 393,312,000.80/x
  3. Step 3: Cross multiply
    393,312,000.80x = 549,616,434.40 × 393,312,000.80
  4. Step 4: Simplify right side
    393,312,000.80x = 216,170,739,486,425,952
  5. Step 5: Solve for x
    x = 216,170,739,486,425,952/393,312,000.80
  6. Step 6: Final answer
    x = 549,616,434.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.