Finding the Fourth Proportional to 390,742,498.68, 539,225,709.26 and 214,541,906.76
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Solution
The fourth proportional to 390,742,498.68, 539,225,709.26 and 214,541,906.76 is: 296,068,413.93
Step by Step Solution
- Step 1: Write the proportion equation
390,742,498.68 : 539,225,709.26 = 214,541,906.76 : x - Step 2: Convert to fraction form
390,742,498.68/539,225,709.26 = 214,541,906.76/x - Step 3: Cross multiply
390,742,498.68x = 539,225,709.26 × 214,541,906.76 - Step 4: Simplify right side
390,742,498.68x = 115,686,511,838,653,776 - Step 5: Solve for x
x = 115,686,511,838,653,776/390,742,498.68 - Step 6: Final answer
x = 296,068,413.93
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.