Home / 319,020,378.40-478,530,567.60-103,631,399.20

Finding the Fourth Proportional to 319,020,378.40, 478,530,567.60 and 103,631,399.20

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Solution

The fourth proportional to 319,020,378.40, 478,530,567.60 and 103,631,399.20 is: 155,447,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,020,378.40 : 478,530,567.60 = 103,631,399.20 : x
  2. Step 2: Convert to fraction form
    319,020,378.40/478,530,567.60 = 103,631,399.20/x
  3. Step 3: Cross multiply
    319,020,378.40x = 478,530,567.60 × 103,631,399.20
  4. Step 4: Simplify right side
    319,020,378.40x = 49,590,792,280,358,192
  5. Step 5: Solve for x
    x = 49,590,792,280,358,192/319,020,378.40
  6. Step 6: Final answer
    x = 155,447,098.80

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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.